WASHINGTON (AP) — Frustrated that cars recalled for serious safety defects aren't getting fixed quickly enough, the nation's auto safety chief will host a gathering of automakers Tuesday to search for solutions. In some recalls for problems as serious as air bags that can spew shrapnel into drivers or fuel tanks that can rupture in a rear-end crash, completion rates are below 15 percent, six months or more after the recalls were announced. These recalls involve millions of vehicles, challenging automakers to find both replacement parts and the cars' owners.Read more on NewsOK.com